Assigbtok to dahiel seables



Jan. 15, 192

Filed June 1920 M w Q I, 5 q m -I1UII\\ bl 1 l 1 0 0 @M 3 Patented Jan. 1 5, l 92 rr E S'l'T v messes enemies JV. PILLIOD, or roLnno, 01-110, ASSEGNOR To DANIEL SEARLES, TRUSTEE,

or 'roLnDo; OHIO.

FLUID-CONTBOL MEANS.

Application filed June 5, 1920. Serial fro/386349.

To all whom it may ooncem:

Be it known that 1, CHARLES J. PILLion, a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have invented a certain new and useful Fluid-Control Means; and I do here apparatus of this character which is quick and practically positive in its operation and adapted to permit a sudden initialmove ment of the control piston during each stroke thereof and a cushioning of the remaining portion of the piston stroke to enhance the practicability and commercial value of such mechanism. j

The invention is fully described in the following specification, and while, in its broader aspect it is capable of embodiment in numerous forms, a preferred embodiment thereof isv illustrated in the accompanying drawings, in Which,-'-

Figure 1 is top View ofa control means embodying the invention with a part broken away. Fig. 2 is a side elevation thereof with portions broken away. Fig. 3 is a sine ilar fragmentary view thereof with the valve and its enclosing casing removed. Fig.

4 is a section on theline 1-4 in Fig, 3 with j a portion broken away. Figs. 5 and 6 are diagrammatical views of the valve member at different limits of its movement, and Fig. 7 is aninner sideview of the valve member.

Referring to the drawings, 1 designates a cylinder having apiston 2 therein with its rod 3 projecting through a stuffing box 4 in an end of the cylinder and, in the present instance, into a cylindrical guide 5 where it connects with a plunger ,6 movable therein. A connecting rod 7 pivotally projects from the outer endof theplunger 6 and connects with the mechanism to be operated or controlled in its movements by the control mechanism. The inner end of the chamber formed by theguide' 5 is provided with a relief passage 8. i

. One sideof the cylinder wall is provided with a fiat circular valve seat 9 having a pair of live steam ports 10, 11 therein in communication through the cylinder walls with respective ends of the cylinder, near the top of the valve seat. At the lower portion of the valve seat, in the present ina stance, is provided an exhaust port 12, which leads to an exhaust pipe 13 and thence to any suitable point of discharge to the atmosphere. At one side of the port 12 is located an exhaust port 1% and at the other side an exhaust port 15 each being in communication through a wall passage with the interior of the cylinder, the port it being open tothe cylinder when the piston 2 is at the. limit of its right hand stroke and the port 15 being open to the cylinder when the piston is at the limit of its left hand stroke, as indicated in Fig. 1. It is thus evident that when the piston has substantially completed its stroke in either direction one or the other of the exhaust passages 14, 15 will be uncovered at the cylinder end thereof to permit a sudden exhaust therefrom to relieve the pressure at the adjacent endof the piston. These exhaust passages may be termed uniflow exhaustpassages.

,Auxiliary exhaust ports 16 and 1. are provided in the valve seat at opposite sides of its center and have their passages in communication with the respective ends of the cylinder and form auxiliary exhaust passages therefrom. Thevalve seat is also provided in its face with recesses 18 and 19 extending fromthe ports 14 and 15 toward the adjacent respective ports 16 and 17 for the purpose hereinafter described.

A disk valve 20 is mounted over the valve seat 9 for turning movements thereon and is enclosed by acasing 21, which is fixed to the cylinder in surrounding relation to the.

valve seat 1 by screws 22, or in any other suitable manner, and cooperates with the valve 20 to forma live steam chamber 23 at the outer side of the valve, which chamber is in communication with a source of fluid pressure supply through a pipe 2 1. A valve stem 25 projects from the valve 20 without of its movement and the latter with the steam port 11 when the valve is in another position o:t"its movement and therebyopen comn' unicationbetween-the live steam ch'am her 23 and one end or theother ottlie'cy-linder, depending on the position. of the valve. The inner or' seat side of the valve 20 is provided at opposite sidesot its center withsegmental grooves or recesses 81 and 32, respectively, in permanent communication'with the auxiliary exhaust ports-16 and 17 inthe' valve seat. pair of recesses 33 and 34" are i rovided in the lower portion of the valve at its inner side inpermanen't communication, respectively, Witlitheunt flow exhaust ports 14: and 15andthe'respec tive recesses 18 and 19in th valve seat;

It is evident that when the valve is in the positionshown in Fig. 5, the valve port 29 is open to the cylinder passage 10, there by admitting live steam to the left hand end of the cylinder, and that at the same time boththe auxiliary anduniflow exhaust passages 17 i and 15 at the opposite end of'the' cylinder are ineommunication'withthemain exhaust passages by reason of the recesses/32, l9'and'34' inthevalvea'nd seat being in communication and the latter in register with the exhaust passage 12, as

shown-by dhtted linesinFig. 5. With the valve in this position the exhaust passages 16' and 1'4 at the left end ofYthe cylinder are clhsed. Upon a movement of thevalve' to the left to the'position" indicated in Fig. 6. the action of admission" and exhaust of fluid to and from the cylinder is reversed so that live fliiid is adinitted to the right end of the cylinder and the exhaust takes place at. the left end thereof.

In the use of this control in connection with a furnace door operating mechanism, as shown in my application for United- States Letters Patent Serial Numher 376,524,.

filed April 26, 1920, with which'it is-more particularly intended for use, the valve does not have a neutral position in which. both cylinder admission ports. are closed,,but is intended to normally stand in the position shown in Fig. 5 to admit fluid to the left end of the cylinder and hold the piston at theright end thereof, thereby exerting adoor closing. pressure on the connected operation mechanism; Toreff ect an open ing of the doors the valve is manually moved to the left to the position shown in Fig. 6 in which live fluid is admitted to the right end of the cylinder to 4 force the piston to'thelett and exhaust" takes place from the left end, first through both the uniflow exhaust passage 14 and the auxiliary exhaust passage 16 and then, after the closing of the passage 14L by the piston, through the auxiliary passage alone. The taking place of the exhaust through the auxiliary passage 16 alone effects-a retarding of the exhaust so as to cushion the outer end of the piston stroke and prevent the hammering action which would otherwise take place by reason of a suddenstopping otthe piston:

I Wish it understood that the invention is not limited to any specific construction, arrangement or form of the parts, as it" is capable of numerous modifications and changes wlthout departmg'fronr thespirit of the claims.

Having-thus desoribed my invention, what I" claim as new and desiretosecure by listters Patent,.1s,

1. In a fliiid control, a cylinder, a live fluid chamber havingai valve seat, an inlet passage from each end of the cylinder to the valve'seat, exhaust passages also leading from each end and from the central portion of the cylinder to the valveseat,

and a disk valvemounted on the seat and" having a pair of ports for opening" communication respectively between the chamber and one or" the other" of the inlet passages when the valve isin'apredetermined position,.saidfvalve seat alsohaving a main exhaust passage to the atmosphere, and said valve having a recess inpermanent communication with each end exhaust passage and a recess in like communication with the exhaust passagefrom the central" portion of the cylinder, said valve recesses cooperating,

to place the exhaust passages- .for either cylinder en'din series communication with the main exhaust passage when the inlet passage at the oppositecylinder endis open.

2. In a fluid control, means forming a cylinder, a live fluid chamber, a valve seat therein, an inlet passage extending from the valve seat to each cylinder end, an auxiliary passage extending from the valve seat at opposite sides of its center to each cylinder, end, a unifiow exhaust passage extending from the valve seat to each cylinder end with the valve seat end of each passage broadened toward the auxiliary passage which extends to the same cylinder end anda main exhaust passage extendingfrom the valve seat at a point between the uniflow exhaust passages, 21-. diskv-alve mountedv on said seatv within the chamber and having a pair of: ports therethrough adapted to open communication respectivelybetweenthe chamber and one or the other of the inlet passages When the valve is in predethe exhaust passages for either cylinder end tel-mined position, said valve also having a in series communication With the main exrecess in permanent communication with haust passage When the inlet passage at the each auxiliary passage and a recess in perother cylinder end is open.

inanent communication with each unifiow In testimony whereof, I have hereunto exhaust passage, said valve recesses coopersigned my name to this specification.

ating in pairs with the seat recesses to place CHARLES J. PILLIOD. 

